Executing court can go beyond the degree - Decree passed by a court without jurisdiction is a nullity - it can be challenged even at the stage of execution

 Kiran Singh & Ors. v. Chaman Paswan & Ors.,

 [1955] l SCR 117 this Court declared;

"It is a fundamental principle well established that a decree passed by a court without jurisdiction is a nullity and that its invalidity could be set up wherever and whenever it is sought to be enforced or relied upon, even at the stage of execution and even in collateral proceedings. A defect of jurisdiction......strikes at the very authority of the Court to pass any decree and such a defect cannot be cured even by consent of parties